Wireless communication device and wireless communication method

Abstract

Disclosed are a wireless communication device and a wireless communication method. According to one embodiment, a wireless communication device for a base station side comprises a transceiver and one or more processors. The processor is configured to: control, in response to a scheduling request aimed at uplink transmission and sent over a licensed band by a user equipment, the transceiver to inspect a channel in an unlicensed band; control, when the inspected channel is idle, the transceiver to send scheduling information aimed at the channel to the user equipment by means of the licensed band; and control the transceiver to receive uplink data transmission sent by the user equipment using the channel.

1 . A wireless communication apparatus for base station side, comprising:
 a transceiving device; and   at least one processor configured to:   control, in response to a scheduling request for uplink transmission transmitted by a user equipment on a licensed frequency band, the transceiving device to detect a channel on an unlicensed frequency band;   determine, in a case where the detected channel is idle, the transceiving device to transmit scheduling information for the channel to the user equipment through a licensed frequency band; and   control the transceiving device to receive uplink data transmitted by the user equipment via the channel.   
     
     
         2 . The wireless communication apparatus according to  claim 1 , wherein the processor is further configured to: control the transceiving device to suspend, for a predetermined time period during reception of the uplink data, the reception of the uplink data and broadcast a channel occupancy signal via the channel. 
     
     
         3 . The wireless communication apparatus according to  claim 2 , wherein the predetermined time period is preset by a system to which the base station belongs. 
     
     
         4 . The wireless communication apparatus according to  claim 3 , wherein a configuration of the predetermined time period is identical to that of at least one other base station in the system. 
     
     
         5 . The wireless communication apparatus according to  claim 1 , wherein the processor is configured not to schedule the channel to the user equipment, in a case where a result of the detection on the channel indicates that the channel is occupied. 
     
     
         6 . A wireless communication method for base station side, comprising:
 detecting, in response to a scheduling request for uplink transmission transmitted by a user equipment on a licensed frequency band, a channel on an unlicensed frequency band;   transmitting, in a case where the detected channel is idle, scheduling information for the channel to the user equipment through a licensed frequency band; and   receiving uplink data transmitted by the user equipment via the channel.   
     
     
         7 . A wireless communication apparatus for user equipment side, comprising:
 a transceiving device; and   at least one processor configured to:   control the transceiving device to transmit a scheduling request for uplink transmission to a base station on a licensed frequency band;   control the transceiving device to receive scheduling information transmitted by the base station on a licensed frequency band, wherein the scheduling information is transmitted by the base station based on a detection on a channel on an unlicensed frequency band; and   control the transceiving device to transmit uplink data to the base station via the channel.   
     
     
         8 . The wireless communication apparatus according to  claim 7 , wherein transmitting the uplink data comprises:
 suspending transmission of the uplink data for a predetermined time period during the transmission of the uplink data.   
     
     
         9 . The wireless communication apparatus according to  claim 8 , wherein the predetermined time period is preset by a system to which the base station belongs. 
     
     
         10 . The wireless communication apparatus according to  claim 7 , wherein the processor is further configured to:
 control, upon reception of the scheduling information, the transceiving device to perform Listen-Before-Talk on the channel; and   trigger transmission of the uplink data in a case where the channel is idle during an idle channel estimation time slot.   
     
     
         11 . The wireless communication apparatus according to  claim 7 , wherein the processor is further configured to:
 control, upon reception of the scheduling information, the transceiving device to perform Listen-Before-Talk on the channel; and   trigger transmission of the uplink data in a case where the channel is idle during both an idle channel estimation time slot and a subsequent random back-off process.   
     
     
         12 . The wireless communication apparatus according to  claim 11 , wherein a duration of the random back-off process is selected randomly in a range of a predetermined competition window. 
     
     
         13 . The wireless communication apparatus according to  claim 11 , wherein the processor is further configured to:
 perform, in a case where the channel is detected to be occupied during the random back-off process, a new random back-off process with a duration randomly re-selected in the range of the predetermined competition window.   
     
     
         14 . The wireless communication apparatus according to  claim 11 , wherein the processor is further configured to:
 adjust, in a case where the channel is detected to be occupied during the random back-off process, a size of the competition window and perform a new random back-off process with a duration randomly re-selected in a range of a new competition window.   
     
     
         15 . The wireless communication apparatus according to  claim 14 , wherein adjusting the size of the competition window comprises doubling the size of the competition window. 
     
     
         16 . A wireless communication method for user equipment side, comprising:
 transmitting a scheduling request for uplink transmission to a base station on a licensed frequency band;   receiving scheduling information transmitted by the base station on a licensed frequency band, wherein the scheduling information is transmitted by the base station based on a detection on a channel on an unlicensed frequency band; and   transmitting uplink data to the base station via the channel.